package com.qyoung.filter;

import javax.servlet.*;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

public class UserFilter implements Filter {
    @Override
    public void init(FilterConfig filterConfig) throws ServletException {

    }

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest request = (HttpServletRequest) servletRequest;
        HttpServletResponse response = (HttpServletResponse) servletResponse;
        Object username = request.getSession().getAttribute("username");
        request.setCharacterEncoding("UTF-8");
        //获取请求的URI
        String uri = request.getRequestURI();
        if (uri.endsWith("success.jsp") && username == null){
            response.sendRedirect("index.jsp");
        }
        filterChain.doFilter(request,response);
}

    @Override
    public void destroy() {

    }
}
